1877.] 153 [Barrows. 



all around the eye, and sometimes in a narrow line almost over the 

 back of the neck between the black of the back and the ash of the 

 head. Breast and belly pure white; a whitish line along the edge of 

 wing as in cirrhata. Length 14-|-15l inches. Wing 7-8 inches; tail 

 2-3 inches. Five specimens. 



No. 54720, skin; Kodiak. 

 " 54721, " " 



" 54723, « " 



" 54724, " " 



Collector's No. 159, d", skin; St. Michaels. 



3. Fratercula arctiea. 



Alca arctiea Linn., 1758. Lunda arctiea Pall. Fratercula arctiea 

 Stephens. Mormon arctiea Illiger. 



Very similar to F. corniculata, but rather smaller; the bill viewed 

 from the side has a more triangular shape, the culmen being, as a 

 rule, less convex. The grooves, which are four or five in number, 

 are less nearly vertical, the basal one beginning almost at the 

 base of the culmen and ending at the anterior point of the nostril. 

 The basal ridge is of the same width throughout, and distinctly 

 pitted. The bill as a whole, is decidedly smaller. The eyelid 

 appendages are much shorter and broader. The distribution of color 

 is exactly the same, with the exception of the black collar, which in 

 this species never reaches the bill. The top of the head is perhaps 

 a little darker, and the white of the face less pure ; there are also 

 darker maxillary patches; otherwise the v two species are precisely 

 similar. Length 13-14 inches. Wing 6-|-7 in.; tail 2^-2-| in. 



A young specimen about two-thirds grown shows marked differ- 

 ences from the adult, especially in the bill, which is rather more than 

 twice as long as deep at the base, with culmen regularly convex, 

 angle of gonys very marked, and rami of lower mandible perfectly 

 evident though rather short. The basal half of the upper mandible, 

 with the exception of the culmen, was evidently soft and membran- 

 ous in life, and a tract of similar size on the lower mandible was 

 evidently softer than the remainder of that part. There is no indi- 

 cation of the pitted ridge at the base of the upper mandible. The 

 areas of color are about the same as in the adult, but the colors 

 themselves are much duller and less distinct. In other respects it is 

 similar to the adult. Five specimens. 



Coll. La Fresnaye, No. 8131, Society's Coll., No. 9205; N. Atlan- 

 tic; mounted. 



